.top-header {
    background: #fff;
    box-sizing: border-box;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;

    .setdefault {
        color: #2e57ff;
        line-height: 70px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .MuiSvgIcon-root {
        width: 80px;
    }
}

.Choosesubject {
    background: #fff;
    display: flex;
    justify-content: center;
    padding-top: 60px;
    padding-bottom: 100px;

    color: #2E57FF;

    span {
        font-size: 72px;
        font-weight: 500;
        display: flex;
        align-items: center;
    }
}

.ProfessionalSub {
    padding: 30px;
    margin-top: 40px;
    background-color: #fff;
}


.left-nav {
    z-index: 999;
    position: fixed;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    display: flex;

    .left {
        padding: 60px;
        background-color: #fff;
        overflow: auto;
        width: 30%;
        background: #fff;

        .nav-item {
            margin-bottom: 50px;
            width: 360px;
            height: 142px;
            border: 1px solid #999999;
            border-radius: 12px;
            font-size: 48px;
            font-family: NotoSansHans;
            font-weight: 400;
            color: #999999;
            text-align: center;
            line-height: 142px;
            background: #F0F0F0;
            z-index: 2;

            &.active {
                background: #FFFFFF;
                color: #2E57FF;
            }
        }
    }

    .right {
        flex: 1;
        background: #000000;
        opacity: 0.5;
    }
}

.hide {
    display: none;
}

.SurePro {
    h2 {
        font-size: 60px;
    }
}

.kuang {
    span {
        font-size: 40px;
    }
}